1. highest frequency

The highest frequency at which device produces audio. The higher the high-frequency response, the clearer and crispier the treble.

20000Hz

Sony MDR-Z1R: 120000Hz

22000Hz

2. lowest frequency

The lowest frequency at which the device produces audio. The lower the low-frequency response, the stronger and juicier the bass.

20Hz

Sony MH1CBLK: 1Hz

18Hz

3. has sound isolation/passive noise reduction

The device sits tightly in place, creating an acoustic seal which reduces background noise and prevents your music from leaking out.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

44% have it

4. weight

141.9g lighter.

363g

Sony MDR-EX150AP: 3g

221.1g

5. has a neodymium magnet

Devices with neodymium magnets are lighter and more powerful than those which use ferrite magnets. They also have more bass and clear high notes.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

36% have it

6. sound pressure level

Devices with a higher sound pressure level are generally louder when supplied with any given audio source.

121dB/mW

AKG K553 Pro: 144dB/mW

113dB/mW

7. has a detachable cable

With a detachable cable you can use alternative cables, and if the cable is pulled it will pop out instead of breaking.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

39% have it

8. has stereo speakers

Devices with stereo speakers deliver sound from independent channels on both left and right sides, creating a richer sound and a better experience.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

76% have it

9. can be folded

Folding devices are good for transporting as they take up less space in your bag.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

31% have it

10. can be used as a headset

A headset is one headphone or pair with a built-in microphone. Headsets can be used for applications which require communication i.e. Skype, games with voice chat, mobile phones etc.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

47% have it

11. has active noise cancelling (noise reduction)

This type of device allows you to listen at lower volume levels, causing less ear fatigue as you don't have to crank up the volume to overcome background noise. Ideal for plane rides and morning commutes.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

15% have it

12. Can be used wirelessly

Wireless devices allow users more freedom of movement.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

27% have it

13. has an in-line control panel

There is a control panel on the cable, so you can easily operate the device without having to interact with it.

Able Planet ANC XNC230B

Sennheiser HD 4.40 BT

47% have it

14. has an over-the-ear form

Comfortable full-size form with earcups that fully enclose your ears. This model is loved for its increased sound isolation and the fact that it won't leak sound to your neighbors. It offers potential for maximum bass and loudness levels.